smallbasicでmqttでsubscribe

##概要
smallbasicでsangoにesp8266からmqttのsubscribeしてみた。
mqttはスクラッチした。
##写真
![MVC-018S.JPG](https://qiita-image-store.s3.amazonaws.com/0/18104/44b020d4-7452-6840-2bf6-0067c249eb4e.jpeg)
##画面
![mqtt.PNG](https://qiita-image-store.s3.amazonaws.com/0/18104/a68834b5-a75d-5516-ff0e-1da6a80467c6.png)
##サンプルコード
```
c = Text.GetCharacter(34)
n = Text.GetCharacter(13) + Text.GetCharacter(10)
button0 = Controls.AddButton("open", 30, 20)
button1 = Controls.AddButton("gmr", 90, 20)
button2 = Controls.AddButton("cwjap", 150, 20)
button3 = Controls.AddButton("cipmux", 210, 20)
button4 = Controls.AddButton("start", 30, 80)
button5 = Controls.AddButton("cifsr", 90, 80)
button6 = Controls.AddButton("loop", 150, 80)
button7 = Controls.AddButton("status", 210, 80)
Controls.ButtonClicked = OnButtonClicked
mtextbox0 = Controls.AddMultiLineTextBox(10, 150)
Controls.SetSize(mtextbox0, 300, 200)
Controls.SetTextBoxText(mtextbox0, "send" + n)
mtextbox1 = Controls.AddMultiLineTextBox(320, 30)
Controls.SetSize(mtextbox1, 300, 400)
Controls.SetTextBoxText(mtextbox1, "recv" + n)
Sub OnButtonClicked
  button = Controls.LastClickedButton
  If (button = button0) Then
    class1.OpenPort("COM5", 115200)
    class1.SetHandshake("n")
    text = Controls.GetTextBoxText(mtextbox0)
    Controls.SetTextBoxText(mtextbox0, text + ">open" + n)
  ElseIf (button = button1) Then
    class1.TXString("AT+GMR" + n)
    text = Controls.GetTextBoxText(mtextbox0)
    Controls.SetTextBoxText(mtextbox0, text + ">gmr" + n)
    Program.Delay(100)
    s = Class1.RXAll()
    if s <> "" then
      text = Controls.GetTextBoxText(mtextbox1) + "@"
      Controls.SetTextBoxText(mtextbox1, text + s + n)
    EndIf
  ElseIf (button = button2) Then
    class1.TXString("AT+CWJAP=" + c +"free-spot" + c  + "," + c + c + n)
    text = Controls.GetTextBoxText(mtextbox0)
    Controls.SetTextBoxText(mtextbox0, text + ">cwjap" + n)
    Program.Delay(3000)
    s = Class1.RXAll()
    if s <> "" then
      text = Controls.GetTextBoxText(mtextbox1) + "@"
      Controls.SetTextBoxText(mtextbox1, text + s + n)
    EndIf
  ElseIf (button = button3) Then
    class1.TXString("AT+CIPMUX=0" + n)
    text = Controls.GetTextBoxText(mtextbox0)
    Controls.SetTextBoxText(mtextbox0, text + ">cipmux" + n)
    Program.Delay(100)
    s = Class1.RXAll()
    if s <> "" then
      text = Controls.GetTextBoxText(mtextbox1) + "@"
      Controls.SetTextBoxText(mtextbox1, text + s + n)
    EndIf
  ElseIf (button = button4) Then
    class1.TXString("AT+CIPSTART=" + c + "TCP" + c  + "," + c + "lite.mqtt.shiguredo.jp" + c + ",1883" + n)
    text = Controls.GetTextBoxText(mtextbox0)
    Controls.SetTextBoxText(mtextbox0, text + ">start" + n)
    Program.Delay(1000)
    s = Class1.RXAll()
    if s <> "" then
      text = Controls.GetTextBoxText(mtextbox1) + "@"
      Controls.SetTextBoxText(mtextbox1, text + s + n)
    EndIf
    class1.TXString("AT+CIPSEND=52" + n)
    text = Controls.GetTextBoxText(mtextbox0)
    Controls.SetTextBoxText(mtextbox0, text + ">auth" + n)
    Program.Delay(1000)
    s = Class1.RXAll()
    if s <> "" then
      text = Controls.GetTextBoxText(mtextbox1) + "@"
      Controls.SetTextBoxText(mtextbox1, text + s + n)
    EndIf
    buf = ""
    buf = buf + Text.GetCharacter(16)
    buf = buf + Text.GetCharacter(50)
    buf = buf + Text.GetCharacter(0)
    buf = buf + Text.GetCharacter(4) + "MQTT"
    buf = buf + Text.GetCharacter(4)
    class1.TXString(buf)
    class1.TXByte(194)
    buf = ""
    buf = buf + Text.GetCharacter(0)
    buf = buf + Text.GetCharacter(60)
    buf = buf + Text.GetCharacter(0)
    buf = buf + Text.GetCharacter(4) + "papa"
    buf = buf + Text.GetCharacter(0)
    buf = buf + Text.GetCharacter(14) + "ohisama@github"
    buf = buf + Text.GetCharacter(0)
    buf = buf + Text.GetCharacter(16) + "@@@@@@@@@@@@@@@@@@"
    class1.TXString(buf)
    text = Controls.GetTextBoxText(mtextbox0)
    Controls.SetTextBoxText(mtextbox0, text + ">" + n)
    Program.Delay(1000)
    s = Class1.RXAll()
    if s <> "" then
      text = Controls.GetTextBoxText(mtextbox1) + "@"
      Controls.SetTextBoxText(mtextbox1, text + s + n)
    EndIf
    class1.TXString("AT+CIPSEND=27" + n)
    text = Controls.GetTextBoxText(mtextbox0)
    Controls.SetTextBoxText(mtextbox0, text + ">sub" + n)
    Program.Delay(1000)
    s = Class1.RXAll()
    if s <> "" then
      text = Controls.GetTextBoxText(mtextbox1) + "@"
      Controls.SetTextBoxText(mtextbox1, text + s + n)
    EndIf
    class1.TXByte(130)
    buf = ""
    buf = buf + Text.GetCharacter(25)
    buf = buf + Text.GetCharacter(0)
    buf = buf + Text.GetCharacter(1)
    buf = buf + Text.GetCharacter(0)
    buf = buf + Text.GetCharacter(20) + "ohisama@github/test0"
    buf = buf + Text.GetCharacter(0)
    class1.TXString(buf)
    text = Controls.GetTextBoxText(mtextbox0)
    Controls.SetTextBoxText(mtextbox0, text + ">" + n)
    Program.Delay(1000)
    s = Class1.RXAll()
    if s <> "" then
      text = Controls.GetTextBoxText(mtextbox1) + "@"
      Controls.SetTextBoxText(mtextbox1, text + s + n)
    EndIf
  ElseIf (button = button6) Then
    While "True"
      class1.TXString("AT+CIPSEND=2" + n)
      text = Controls.GetTextBoxText(mtextbox0)
      Controls.SetTextBoxText(mtextbox0, text + ">ping" + n)
      Program.Delay(1000)
      class1.TXByte(192)
      class1.TXByte(0)
      Program.Delay(29000)
      s = Class1.RXAll()
      if s <> "" then
        text = Controls.GetTextBoxText(mtextbox1) + "@"
        Controls.SetTextBoxText(mtextbox1, text + s + n)
        TextWindow.WriteLine(s)
      EndIf
    EndWhile
  ElseIf (button = button5) Then
    class1.TXString("AT+CIFSR" + n)
    text = Controls.GetTextBoxText(mtextbox0)
    Controls.SetTextBoxText(mtextbox0, text + ">cifsr" + n)
    Program.Delay(1000)
    s = Class1.RXAll()
    if s <> "" then
      text = Controls.GetTextBoxText(mtextbox1) + "@"
      Controls.SetTextBoxText(mtextbox1, text + s + n)
    EndIf  
  ElseIf (button = button7) Then
    class1.TXString("AT+CIPSTATUS" + n)
    text = Controls.GetTextBoxText(mtextbox0)
    Controls.SetTextBoxText(mtextbox0, text + ">status" + n)
    Program.Delay(1000)
    s = Class1.RXAll()
    if s <> "" then
      text = Controls.GetTextBoxText(mtextbox1) + "@"
      Controls.SetTextBoxText(mtextbox1, text + s + n)
    EndIf  
  EndIf
EndSub
```